What does the Baxi E53 fault code mean?

Your boiler is not burning gas correctly because something is likely blocking the external exhaust pipe or the air supply.

How much does it cost to fix Baxi error code E53?

Typical repair cost for the Baxi E53 fault is £80-250 including labour.

Poor combustion – flue terminal may be blocked

This is a emergency severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Each noise points to a different fault.

Older boilers — thermocouple, draught, gas supply.

Safety-critical — turn off, read this.